Surface acoustic wave device

Details Surface acoustic wave device Surface acoustic wave device

1976-06-14

1978-02-21

Smith, Alfred E.

Wave transmission lines and networks

Automatically controlled systems

With control of equalizer and/or delay network

310313, 310366, 333 30R, H03H 904, H03H 926, H03H 932

Patent

active

040755827

ABSTRACT:
A surface acoustic wave filter is provided having an input and an output transducer, each consisting of a pair of comb-like structures, wherein the electrodes or teeth are interleaved and are varied in length in accordance with a weighting function determined by the Fourier transformation of the respective transducer characteristic frequency response so as to each produce a pair of frequency passbands symmetrical about their characteristic frequency. The latter frequency passband of the input transducer has the same passband center frequency as the first frequency passband of the output transducer. The coincident passbands of said input and output transducers resulting in an output from the output transducer having the center frequency of the coincident passbands.

REFERENCES:
patent: 3836876 (1974-09-01), Marshall et al.
patent: 3987376 (1976-10-01), Kerbel

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